The Pearl Index, also called the Pearl rate, is the most common technique used in clinical trials for reporting the effectiveness of a birth control method.
Read more about Pearl Index: Calculation and Usage, History, Criticisms
Famous quotes containing the words pearl and/or index:
“Then must you speak
Of one that loved not wisely but too well;
Of one not easily jealous, but being wrought,
Perplexed in the extreme; of one whose hand,
Like the base Judean threw a pearl away
Richer than all his tribe.”
—William Shakespeare (1564–1616)
“Exile as a mode of genius no longer exists; in place of Joyce we have the fragments of work appearing in Index on Censorship.”
—Nadine Gordimer (b. 1923)